16027221 has 8 divisors (see below), whose sum is σ = 24422464. Its totient is φ = 9158400.

The previous prime is 16027183. The next prime is 16027237. The reversal of 16027221 is 12272061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16027221 - 2¹¹ = 16025173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 763201 = 16027221 / (1 + 6 + 0 + 2 + 7 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16027321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381580 + ... + 381621.

It is an arithmetic number, because the mean of its divisors is an integer number (3052808).

Almost surely, 2^16027221 is an apocalyptic number.

It is an amenable number.

16027221 is a deficient number, since it is larger than the sum of its proper divisors (8395243).

16027221 is an equidigital number, since it uses as much as digits as its factorization.

16027221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763211.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 16027221 is about 4003.4011789977. The cubic root of 16027221 is about 252.1270303110.

Adding to 16027221 its reverse (12272061), we get a palindrome (28299282).

The spelling of 16027221 in words is "sixteen million, twenty-seven thousand, two hundred twenty-one".